12 22 29 triangle
Obtuse scalene triangle.
Sides: a = 12 b = 22 c = 29Area: T = 120.7832604294
Perimeter: p = 63
Semiperimeter: s = 31.5
Angle ∠ A = α = 22.24987765252° = 22°14'56″ = 0.38883144049 rad
Angle ∠ B = β = 43.96597525293° = 43°57'35″ = 0.767724242 rad
Angle ∠ C = γ = 113.7911470945° = 113°47'29″ = 1.98660358287 rad
Height: ha = 20.1330434049
Height: hb = 10.9880236754
Height: hc = 8.33298347789
Median: ma = 25.03299820216
Median: mb = 19.27443352674
Median: mc = 10.18657743937
Inradius: r = 3.83443683903
Circumradius: R = 15.84766528453
Vertex coordinates: A[29; 0] B[0; 0] C[8.63879310345; 8.33298347789]
Centroid: CG[12.54659770115; 2.7776611593]
Coordinates of the circumscribed circle: U[14.5; -6.39326838183]
Coordinates of the inscribed circle: I[9.5; 3.83443683903]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 157.7511223475° = 157°45'4″ = 0.38883144049 rad
∠ B' = β' = 136.0440247471° = 136°2'25″ = 0.767724242 rad
∠ C' = γ' = 66.20985290545° = 66°12'31″ = 1.98660358287 rad
Calculate another triangle
How did we calculate this triangle?
Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.
1. The triangle circumference is the sum of the lengths of its three sides

2. Semiperimeter of the triangle

3. The triangle area using Heron's formula

4. Calculate the heights of the triangle from its area.

5. Calculation of the inner angles of the triangle using a Law of Cosines

6. Inradius

7. Circumradius
